EP0401873A2
Expired / Lapsed
EP
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A communications system
Assignee: Communications Patents Ltd
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Filing: 1983-05-12
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Granted: —
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Expires: 2003-05-12
Abstract
Abstract A communications system comprising a plurality of subscriber units each connected to a communications network capable of delivering any one of a plurality of different signals on respective television channels. At least one subscriber unit is provided with a teletext receiver, and teletext signals are supplied on one television channel of the system. The subscriber unit is allocated exclusive use of one teletext sub-page, the content of which sub-page is responsive only to data signals supplied by the respective subscriber unit.
Inventors
- 👤 Eric John Gargini
- 👤 Henry Louis Baker
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 22:38
CPC Classifications
H; H04; H04N; H04N7/00; H04N7/025; H04N7/03; H04N21/00; H04N21/40; H04N21/47; H04N21/488; H04N21/4888; H04N7/08; H04N7/087; H04N7/088; H04N7/0888; H04N7/10; H04N7/16; H04N7/173; H04N7/17309; H04N7/17345; H04N7/17354; H04N2007/17372
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
93 words
A communications system comprising a plurality of subscriber units each connected to a communications network capable of delivering any one of a plurality of different signals on respective television channels, wherein at least one subscriber unit is provided with a teletext receiver, means are provided for supplying teletext signals on one television channel of the system, and said at least one subscriber unit is allocated exclusive use of one teletext sub-page, the content of the said one sub-page being responsive only to data signals supplied by the said at least one subscriber unit.
Claim 2
Dependent Claim
93 words
A communications system comprising a plurality of subscriber units each connected to a communications network capable of delivering any one of a plurality of different signals on respective television channels, wherein at least one subscriber unit is provided with a teletext receiver, means are provided for supplying teletext signals on one television channel of the system, and said at least one subscriber unit is allocated exclusive use of one teletext sub-page, the content of the said one sub-page being responsive only to data signals supplied by the said at least one subscriber unit.
Claim 3
Dependent Claim
111 words
A communications system according to claim 21, wherein a first television channel is dedicated to full field teletext signals, and a second channel is dedicated to provide interactive services, means being provided such that if the said one subscriber unit transmits data over the system in response to information on the second channel a system response is transmitted on the sub-page of teletext dedicated to that subscriber unit, the subscriber units selector at the exchange being automatically controlled to momentarily connect the teletext receiver to the said first channel such that the data transmitted on the dedicated sub-page is acquired and inlaid on the picture received from the said second channel.
References Cited (Backward Citations)
No citation records indexed.
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